The moon may still be geologically active, judging from the way the lunar far side is wrinkling as the moon contracts. At ...

The brown dwarf is close to a yellow star and a moon that should receive as much light as Earth, but because it orbits the star every three hours, the days are very short. Brown dwarf moons have ...

One idea is that Pluto got its moon system when a massive object smashed into the dwarf planet. The resulting debris then formed into the moons. This hypothesis was nicknamed the “Big Whack.” ...

New research suggests that billions of years ago, Pluto may have captured its largest moon, Charon, with a very brief icy "kiss." The theory could explain how the dwarf planet (yeah, we wish Pluto was ...

Pluto likely acquired large moon Charon in a “kiss and capture” collision billions of years ago. It may have created a subsurface ocean on the icy dwarf planet.

Mars will hide behind the wolf moon Monday night as a result of a phenomenon known as an occultation, a fancy word that ...

Asteroid Bennu’s dust reveals amino acid precursors and ancient water traces, fueling hopes that Saturn’s moon Enceladus and ...

But that methane hint may have given away one of this brown dwarf's biggest secrets: a volcanically active moon in its orbit. Jupiter and Saturn offer clues It turns out methane emissions ...

Dwarf planet Pluto and our Earth are the only two worlds in our solar system with very large moons. These may have come about by a "kiss and capture" process, which preserves a moon's large size.